56 lines
1.4 KiB
ReStructuredText
56 lines
1.4 KiB
ReStructuredText
|
.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
|
||
|
|
|
||
|
|
.. _V4L2-SDR-FMT-PCU16BE:
|
||
|
|
|
||
|
|
******************************
|
||
|
|
V4L2_SDR_FMT_PCU16BE ('PC16')
|
||
|
|
******************************
|
||
|
|
|
||
|
|
Planar complex unsigned 16-bit big endian IQ sample
|
||
|
|
|
||
|
|
Description
|
||
|
|
===========
|
||
|
|
|
||
|
|
This format contains a sequence of complex number samples. Each complex
|
||
|
|
number consist of two parts called In-phase and Quadrature (IQ). Both I
|
||
|
|
and Q are represented as a 16 bit unsigned big endian number stored in
|
||
|
|
32 bit space. The remaining unused bits within the 32 bit space will be
|
||
|
|
padded with 0. I value starts first and Q value starts at an offset
|
||
|
|
equalling half of the buffer size (i.e.) offset = buffersize/2. Out of
|
||
|
|
the 16 bits, bit 15:2 (14 bit) is data and bit 1:0 (2 bit) can be any
|
||
|
|
value.
|
||
|
|
|
||
|
|
**Byte Order.**
|
||
|
|
Each cell is one byte.
|
||
|
|
|
||
|
|
.. flat-table::
|
||
|
|
:header-rows: 1
|
||
|
|
:stub-columns: 0
|
||
|
|
|
||
|
|
* - Offset:
|
||
|
|
- Byte B0
|
||
|
|
- Byte B1
|
||
|
|
- Byte B2
|
||
|
|
- Byte B3
|
||
|
|
* - start + 0:
|
||
|
|
- I'\ :sub:`0[13:6]`
|
||
|
|
- I'\ :sub:`0[5:0]; B1[1:0]=pad`
|
||
|
|
- pad
|
||
|
|
- pad
|
||
|
|
* - start + 4:
|
||
|
|
- I'\ :sub:`1[13:6]`
|
||
|
|
- I'\ :sub:`1[5:0]; B1[1:0]=pad`
|
||
|
|
- pad
|
||
|
|
- pad
|
||
|
|
* - ...
|
||
|
|
* - start + offset:
|
||
|
|
- Q'\ :sub:`0[13:6]`
|
||
|
|
- Q'\ :sub:`0[5:0]; B1[1:0]=pad`
|
||
|
|
- pad
|
||
|
|
- pad
|
||
|
|
* - start + offset + 4:
|
||
|
|
- Q'\ :sub:`1[13:6]`
|
||
|
|
- Q'\ :sub:`1[5:0]; B1[1:0]=pad`
|
||
|
|
- pad
|
||
|
|
- pad
|